Improvement in thrashing-machine



G. W. LEE. Thragvshing Machine.

detached. u i

Similar letters of reference denote corresponding y 4 werden@ GEORGE V"vv, lLEE, OFHOMEWORTH, AssieNOn rro HIMsELr AND O. AULT- MANyOFOA-NTON, OHIO. ,i

i Letters Patent No'.'105,344, dated Juli/".112, t

IMPROVEMENT' 1N THRAsHmG-MACHINE.

lhe Schedule'I referred to in these LettersP-atent and making part of the saine.

` To all whom tt may'concern:

Be it' known that I, GEoRGE W. LEE, of Homeworth, Columbiana county,`State-Of Ohio. have in! vented certain new and useful Improvements in Thrashi ng-Macliines, or ThrashenConcaves, of which the following is afull, clar, andexact description, reference beingh'ad to the accompanying Ydrawing making a partof this speciticatiolnin which- 4 e `Figure l is a plan br top view ofthe machine, with aportiou of the cylinder broken away to show the concave; p .e w

. Figure 2 is a vertical section on `liuc y y fig. 1,;and

Figure ,3 represents a` portion of one of the toothed sections of 'thel concave, anda-lso, one of the teeth `parts in all theigres.

My invention consists in a novel constrl'lction of the e `teeth of the concave, whereby they-are adapted to allow the passage'` ofthe grain or straw 'with the least possible obstruction consistent with the object to he attained, viz., the thorough thrashing out of the grain in such manner as toavoid the usual cutting or tear bin g to pieces, and consequent destruction of the straw,

and, at the same time, enabling nieto drive the machine with less; power `than has `heretofore been revIt also consistsin the manuel' vof combining said teeth with thepconeave Aor the sections thereof, where- `by they are'adapted to be readily removed and replaced when brokernor for other purposes, as will he described. 4 i i' i j In theI annexed drawing-- 4 A represents an upright fralne-work, in bearings, a a, in the upper portion ofgvhich is mounted a horizontal. shait'carryiiigthe thrashing-drum or `cylinder B, all 'ofwhich may` be of anyusnal ordesired construction. i L v Directly underneath the cylinder B is arranged the t,11rasl`1e1'concave, composed, inV this instance, of feedapron, G,ftootl1ed sectional) D', and` screen or deliv- `ery-apron `or tail-plate, E, fitting in and made removable from adjustable grooved'side plates F. i

` Thetoothed'sections D D' are grooved at regular intervals on their innerconcave i faces,A to receive the teeth c, said grooves extending across the sections vand .terminatingat one end against an inclined or Lf shaped flange or lip, d, formed upon or l-rmly secured to one edge of the section. Y p

'These grooves are open at one end to permit the 'insertionof teeth, e, which are made triangular in form, substantiallyas represented in fig. 3, detached. s

The inclined Aupper face of these teeth, or that which acts on the grain, is, by preference,vv made slightly convex or arching, and the rear-upright lface is notched,

vas shown ate', or otherwise adapted Jto-'engage with i and be held by the flange or lip (l on the sections D D.l After theteeth have been properly inserted, abar, d', placed over the open ends of the grooves and rmly attached to the tooth-plates or sect-ions, prevents the d accidental withdrawal or displacementof the teeth.

4The teeth, constructed and secured in place in the.

sections as described, when arranged in the concave,

assume a relation to the cylinder substantially such as is shown in tig. 2, that is to say, with the inclined sides or edges facing the incoming grain, and with theV highest point or apex ,of the tooth rising .into close l ment of the interlocking teeth of the concave4 and 4 cylinder, as heretofore ordinarily constructed.

lIt will be apparent from the foregoing that, while 'the grain is as eifectually operated. upon, the avoidance ot' the-tearing or breaking to pieces of the straw, and the consequent gentler Or less abrupt action ot' the teeth, will enable the machine to be driven with ninch less power than machines of Ordinary'construction. t

Having now described my invention,

`What Iclann asnew, and desire tov secure by Letters Patent, is

l. In combination with the grooved concave sections D, the removable teeth e, when constructed as dc'- scribed, .and arrangedA to operate relatively to the tliiasliing'-cyliucler, substantially as shown.

2.y In combination with the grooved concave sections D, and removable teeth e, thefange d, and bar d', substantially as and for the vpurpose described.

. Witnesses: GEORGE W. LEE.

A J'osHUA LEE, y

S. A. T. LEE. 

